The CD4516BE presettable binary up/down counter consists of four synchronously clocked D-type flip-flops (with a gating structure to provide T-type flip-flop capability) connected as counters. These counters can be cleared by a high level on the RESET line, and can be preset to any binary number present on the jam inputs by a high level on the PRESET ENABLE line.
If the CARRY-IN input is held low, the counter advances up or down on each positive-going clock transition. Synchronous cascading is accomplished by connecting all clock inputs in parallel and connecting the CARRY-OUT of a less significant stage to the CARRY-IN of a more significant stage.
The CD4516BE can be cascaded in the ripple mode by connecting the CARRY-OUT to the clock of the next stage. If the UP/DOWN input changes during a terminal count, the CARRY-OUT must be gated with the clock, and the UP/DOWN input must change while the clock is high. This method provides a clean clock signal to the subsequent counting stage. These devices are similar to type MC14516.
Medium-speed operation - fCL = 8 NHz typ. at 10 V
Synchronous internal carry propagation
Reset and Preset capability
100% tested for quiescent current at 20 V
5-V, 10-V, and 15-V parametric ratings
Standardized, symmetrical output characteristics
Maximum input current of 1 ľA at 18 V over full package-temperature range; 100 nA at 18 V and 25°C
Noise margin (full package-temperature range) =
1 V at VDD = 5 V
2 V at VDD = 10 V
2.5 V at VDD = 15 V
Up/Down difference counting
Multistage synchronous counting
Multistage ripple counting
Synchronous frequency dividers
16 pin DIP. Manufactured by RCA.
Sold in a package of 24.